Abstract: An interface device is equipped with a switching control circuit for acquiring a phase difference between an acquisition synchronization signal having a predetermined period including an effective period and a blanking period and a transmission synchronization signal having a period different from that of the acquisition synchronization signal, the different period including an effective period and a blanking period, the switching control circuit correcting the phase difference between the acquisition synchronization signal and the transmission synchronization signal by changing the blanking period of the transmission synchronization signal. Appropriate synchronization between the acquisition of an image and the transmission of an image can be maintained when image data is buffered using the interface device.